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May 24, 1952


JAMA. 1952;149(4):371. doi:10.1001/jama.1952.02930210055018

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The use of electrical devices for the intermittent or continuous dispersion of insecticides into the atmosphere of commercial establishments and homes has become popular in the last few years because of the convenience and simplicity of these devices in the control of flying insects. Developmental data obtained under controlled conditions with certain of the machines indicated that amounts of poison were dispensed that neither deposited in significant quantities on exposed surfaces nor accumulated in the atmosphere of properly ventilated areas sufficiently to cause injury to humans exposed for ordinary working periods.

It was found under practical conditions of use, however, that the laboratory standards for safe and effective performances were not being duplicated in practice. Poor construction and installation of units, tampering to effect greater control, overheating that resulted in excessive output, substitution of chemicals and formulas other than those recommended, installation in homes where overexposure of young children was

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